Pretty much as the title says.
For the last week or so, I've been trying to think of any reason why GPIO46/47 would be turned into I2C bus and connected to GPIO expander on CM3, instead of.. using them the same way they were being used before, like it was on CM1.
Why was this done? It would be nice if someone who was actually involved in "designing" this feature contribute an answer.
It doesn't really affect my design in any way, I'm just curious why unnecessary complicate something that already worked.